ozone: gbm: Add overlay support

ui/ozone/platform/dri/dri_surface.cc

Index: ui/ozone/platform/dri/dri_surface.cc
diff --git a/ui/ozone/platform/dri/dri_surface.cc b/ui/ozone/platform/dri/dri_surface.cc
index e0813b6d0c74d64d9d1c601317ba6efeed3b8ad8..0dbfdf9d02fbbdc1ba5de5888a5787e51cd85c67 100644
--- a/ui/ozone/platform/dri/dri_surface.cc
+++ b/ui/ozone/platform/dri/dri_surface.cc
@@ -54,6 +54,9 @@ uint32_t DriSurface::GetHandle() const {
   return backbuffer()->handle();
 }
 
+void DriSurface::PreSwapBuffers() {
+}
+
 // This call is made after the hardware just started displaying our back buffer.
 // We need to update our pointer reference and synchronize the two buffers.
 void DriSurface::SwapBuffers() {